Gravitational-wave asteroseismology with fundamental modes from compact binary inspirals
Gravitational-wave asteroseismology with fundamental modes from compact binary inspirals
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DOI：
10.1038/s41467-020-15984-5
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发表时间：
2019-05
影响因子：
16.6
通讯作者：
G. Pratten;P. Schmidt;T. Hinderer
中科院分区：
文献类型：
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作者：
G. Pratten;P. Schmidt;T. Hinderer
来自双星中子星的引力波（GWs）通过与各种现象（包括螺旋期间的潮汐效应）相关的特征信号编码了关于超致密物质的独特信息。主要的潮汐特征主要取决于状态方程（EoS）相关的潮汐变形参数Λ，但在后期也由星星的基本振荡模式（f-模式）的频率来表征。在广义相对论中，对于核物质，Λ和thef-modes是由普适关系联系在一起的，这可能不适用于引力或奇异物质的其他理论。独立测量Λ和f模频率可以测试引力和致密双星的性质。在这里，我们提出了直接测量的约束的f-模式频率的同伴GW 170817。我们还表明，未来的GW探测器网络将测量f模式频率在几十赫兹，使精确的GW星震学与二进制inspiral信号单独。
Gravitational waves (GWs) from binary neutron stars encode unique information about ultra-dense matter through characterisic signatures associated with a variety of phenomena including tidal effects during the inspiral. The main tidal signature depends predominantly on the equation of state (EoS)-related tidal deformability parameter Λ, but at late times is also characterised by the frequency of the star’s fundamental oscillation mode (f-mode). In General Relativity and for nuclear matter, Λ and thef-modes are related by universal relations which may not hold for alternative theories of gravity or exotic matter. Independently measuring Λ and thef-mode frequency enables tests of gravity and the nature of compact binaries. Here we present directly measured constraints on thef-mode frequencies of the companions of GW170817. We also show that future GW detector networks will measuref-mode frequencies to within tens of Hz, enabling precision GW asteroseismology with binary inspiral signals alone.